[9fans] breakpoint and single step on ARM

[9fans] breakpoint and single step on ARM

[Richard Miller]

A couple of patches applied yesterday should make debugging on ARM a
bit more reliable.  Using db or acid on ARM, you may have noticed that
a program being debugged would sometimes execute through a breakpoint
without stopping, or run away while being single stepped.  It turns out,
as often happens, that one symptom had two separate causes.  For details:
	/n/sources/patch/applied/5db-condcode/readme
	/n/sources/patch/applied/arm-bkpt-cond/readme

To take advantage of the patches, rebuild libmach.a, then acid and db.
On machines with a kw kernel (sheevaplug et al), you'll also want to
rebuild /arm/9plug; otherwise breakpoints will stop working at all.
The new 9plug will, however, still work with the old libmach; and
the bcm and teg2 kernels are already compatible with the new libmach.

Re: [9fans] breakpoint and single step on ARM

[erik quanstrom]

On Sat Aug  3 16:28:26 EDT 2013, 9fans@hamnavoe.com wrote:
> A couple of patches applied yesterday should make debugging on ARM a
> bit more reliable.  Using db or acid on ARM, you may have noticed that
> a program being debugged would sometimes execute through a breakpoint
> without stopping, or run away while being single stepped.  It turns out,
> as often happens, that one symptom had two separate causes.  For details:
> 	/n/sources/patch/applied/5db-condcode/readme
> 	/n/sources/patch/applied/arm-bkpt-cond/readme
>
> To take advantage of the patches, rebuild libmach.a, then acid and db.
> On machines with a kw kernel (sheevaplug et al), you'll also want to
> rebuild /arm/9plug; otherwise breakpoints will stop working at all.
> The new 9plug will, however, still work with the old libmach; and
> the bcm and teg2 kernels are already compatible with the new libmach.

thanks!

- erik